<template>
  <Select
    @dropdown-visible-change="handleFetch"
    v-bind="$attrs"
    @change="handleChange"
    :options="getOptions"
    v-model:value="state"
  >
    <template #dropdownRender>
      <div style="overflow-x: scroll">
        <Table
          size="small"
          ref="tableElRef"
          :data-source="options"
          :columns="columns"
        />
      </div>
    </template>
    <template #[item]="data" v-for="item in Object.keys($slots)">
      <slot :name="item" v-bind="data || {}"></slot>
    </template>
    <template #suffixIcon v-if="loading">
      <LoadingOutlined spin />
    </template>
    <template #notFoundContent v-if="loading">
      <span>
        <LoadingOutlined spin class="mr-1" />
        {{ t('component.form.apiSelectNotFound') }}
      </span>
    </template>
  </Select>
</template>
<script lang="ts">
import {
  defineComponent,
  PropType,
  ref,
  watchEffect,
  computed,
  unref,
  watch,
} from 'vue';

import { Select, Table } from 'ant-design-vue';
import { isFunction } from '@/utils/is';
import { useRuleFormItem } from '@/hooks/component/useFormItem';
import { useAttrs } from '@/hooks/core/useAttrs';
import { get, omit } from 'lodash-es';
import { LoadingOutlined } from '@ant-design/icons-vue';
import { useI18n } from '@/hooks/web/useI18n';
import { propTypes } from '@/utils/propTypes';

type OptionsItem = { label: string; value: string; disabled?: boolean };

export default defineComponent({
  name: 'ApiSelectTable',
  components: {
    Select,
    Table,
    LoadingOutlined,
  },
  inheritAttrs: false,
  // 字典编码 从前端字典缓存中获取
  dictCode: propTypes.string.def(''),
  props: {
    value: [Array, Object, String, Number],
    numberToString: propTypes.bool,
    api: {
      type: Function as PropType<(arg?: Recordable) => Promise<OptionsItem[]>>,
      default: null,
    },
    // api params
    params: propTypes.any.def({}),
    // support xxx.xxx.xx
    resultField: propTypes.string.def(''),
    labelField: propTypes.string.def('label'),
    valueField: propTypes.string.def('value'),
    immediate: propTypes.bool.def(true),
    alwaysLoad: propTypes.bool.def(false),
    exclude: propTypes.array.def([]),
    columns: propTypes.shape<BasicColumn[]>([]),
  },
  emits: ['options-change', 'change', 'update:value'],
  setup(props, { emit }) {
    const options = ref<OptionsItem[]>([]);
    const loading = ref(false);
    const isFirstLoad = ref(true);
    const emitData = ref<any[]>([]);
    const attrs = useAttrs();
    const { t } = useI18n();
    // const [registerTable, { reload }] = useTable({
    //   title: '列表',
    //   api: props.api,
    //   columns: props.columns,
    //   //   formConfig: {
    //   //     labelWidth: 120,
    //   //     schemas: searchFormSchema,
    //   //     baseColProps: { span: 12 },
    //   //   },
    //   useSearchForm: false,
    //   bordered: true,
    //   showIndexColumn: false,
    // });
    const getOptions = computed(() => {
      const { labelField, valueField, numberToString } = props;

      return (
        unref(options)
          .reduce((prev, next: Recordable) => {
            if (next) {
              const value = get(next, valueField);
              prev.push({
                ...omit(next, [labelField, valueField]),
                label: get(next, labelField),
                value: numberToString ? `${value}` : value,
              });
            }
            return prev;
          }, [] as OptionsItem[])
          // 排除选项
          .filter((op) => props.exclude.indexOf(op.value) === -1)
      );
    });
    // Embedded in the form, just use the hook binding to perform form verification
    const [state] = useRuleFormItem(props, 'value', 'change', emitData);

    watchEffect(() => {
      props.immediate && !props.alwaysLoad && fetch();
    });

    watch(
      () => state.value,
      (v) => {
        emit('update:value', v);
      }
    );

    watch(
      () => props.params,
      () => {
        !unref(isFirstLoad) && fetch();
      },
      { deep: true }
    );
    // watch(
    //   () => props.dictCode,
    //   (v) => {
    //     options.value = getDictList(v);
    //   }
    // );
    async function fetch() {
      const api = props.api;
      if (!api || !isFunction(api)) return;
      options.value = [];
      try {
        loading.value = true;
        const res = await api(props.params);
        if (Array.isArray(res)) {
          options.value = res;
          setTimeout(() => {
            emitChange();
          });
          return;
        } else {
          options.value = res.rows;
        }
        emitChange();
      } catch (error) {
        console.warn(error);
      } finally {
        loading.value = false;
      }
    }

    async function handleFetch(visible) {
      if (visible) {
        if (props.alwaysLoad) {
          await fetch();
        } else if (!props.immediate && unref(isFirstLoad)) {
          await fetch();
          isFirstLoad.value = false;
        }
      }
    }

    function emitChange() {
      emit('options-change', unref(options));
    }

    function handleChange(_, ...args) {
      emitData.value = args;
    }

    return {
      state,
      getOptions,
      options,
      attrs,
      loading,
      t,
      handleFetch,
      handleChange,
    };
  },
});
</script>
